Filter



T. F. SEITZ ET AL.

FILTER Nov. 22,1927. 1,650,543

Filed March 18. 1926 2 Sheets-Sheet 2 S ATE 'ronann rnrnnnrcn snrrz Am) none nnimucn smrrz} m, or knnuznacn,

enammv, assmnons TO snirz-wnnxn e. m. 3. 1a., or moznaon, GERMANY.

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a lication filed March is, 1926, Serial n... 95,724, and in Germany March 25, 1925,

In filters, particularly in deposition filters and the like, the individual filter frames'are usually inserted into the filter tank from above, after'the cover has been removed. In such cases the individual frames are connected at the'top and bottom through their connecting pipes with the discharge passages and are rigidly joined thereto by a screw connection. A screw connection is provided for each frame at the upper and lower discharge passages, so that the lower points of connection are hidden and inaccessible and therefore cannot be regulated.

In a filter according to the present inven tion the filter tank is provided with a door or removable member at one side and the in.-

dividual frames are inserted from thatside in the direction of their length. The-discharge passages are arranged at the top and at the bottom of the front of the tank so that the points of connection with the :framesare always accessible and regulable. A secure connection of each individual frame isensured thereby. Moreover by this arrangement of. the connection points a connection between frame and discharge passages is eiiected without the risk of air-lock so that in consequence air cannot collect at the points oi connection in the upper portion of the frames and be carried along from time to time with the flowing liquid.

lln order to guide the individual frames,

securely while they are being pushed into the tank and to ensure that they shall remain at the required intervals from each other which are necessary for the uniform distribution of the filtering material on the individual frames, the distributing plates arranged at the top and bottom of the filter tank, and

' heavy. The tank to the subject at the transverse strengthening rib;

PATENT OFFICE. f-

present invention ismanufactured or-built.

up from separate sheets .of metal whose edges are bent up and which abut against one which provide sufficient reinforcement for the walls. These ribs are preferably welded together but may be riveted or otherwise connected together; The ribs may be'as narrow as necessary, the wall being produced from suitably narrow strips of sheet-metal w th bent-up edges. If occasion demands other strengthening ribs may be arranged at right angles to these 'ribs, being preferably made from longitudinallyfolded strips of sheet metal. These strips are provided with incisions or slots'at the points where they cross and-bridge over the ribs of the bent plates.

Such tanks may be employed for various purposes but, in particular, they may be utilized as filter tanks.

One constructional for'm ofa filter tank is illustrated, by way of example, in the accom- I panying drawings, in which Fig. 1 is .a side elevation, Fig. 2 a front view with the door open or removed, Fi 3 a view from above, partially in section, Fig. 4: a section on the line A-B in Fig. 1, Fig. 5 a perspectiveview of a reinforced tank, Fig. 6 a section thereof and Fig. 7 shows, in cross section, a'

The individual filter frames are indicated by the figure 1 and the tank for receiving them by 2. The tank has a door 3 (Fig. 3)

by meansof which the opening 4; at the side,

which serves as the opening for the i'nser-- tion of the frames, may be closed. Each frame 1 carries at-lts front two connecting members 5, 6, each of which engages, by means of a pin 7, 8, a corresponding hole in the corresponding liquid discharge pipe or member, and each of which is packed around this hole by a packing disc 11, 1-2. lhe discharge members 9 and 10 are secured transversely at thetop and bottom of the tank and communicate with pipes mounted at the outside of the tank.

Transverse bridge members 13,14. are provided in front of each of the outlet members 9, 10 respectively, engaging at the ends in supports 15 mounted in the walls of thetank,

lot

' strengthening bars 25.may

the connecting member and discharge mem-.

bersis made thereby. It is only necessary to release the screws 16, 17 and to take out the bridges 13, 14, toenable the frames to .be drawn out, each frame being provided with a handle 18 for this purpose.

It will be understood, particularly from an inspection of Fig. 1, that the connecting member is so constructed and arranged that the possibility of the formation of an air lock is revented. 7

ach frame carries at the top and bottom .of its rear end guide'rollers 19, 20, respectively which travel in the corrugations of the upper and lower corrugated plates 21 and 22. These corrugated plates also serve as distributing plates for the unfiltered liquid, and, for this purpose, are. provided with suitable perforations. The corrugated plates enable the individual plates to be inserted and maintained at exactly the required intervals apart so that the intermediate spaces between the individual plates are equaland the distribution of thefilter material thereon is, in consequence, uniform. In place 'of the uide rollers suitable sliding members could fie provided.

The walls ofthe tank are made from separate strips or plates 23 of sheet metal, which are bent up at their edges at 24. In assembling the strips to form a tank these bent edges are placed one aga inst another, ,as' shown in; Fig. 6, and are permanently connected together by welding, for example. Vertical ribs, which strengthen the plane walls of the tank, are thus formed.

At right angles to these ribs transverse be applied to the walls, these bars consistin preferably of folded strips of sheet metal aving their edges bent out at 26 (Fig. 7). The bent out edges 26 thus serve for attachment to the tank walls, by, for instance, welding. These strengtheningstrips are deeper than the ribs 24, and are provided at the points of intersection with the slots so that they can bridge over the ribs 24. According to the size of or to the rigidity required for the tank-wall in question, these strengthening strips may be arranged more or less close together.' In this manner a tank is formed which has walls which can withstand internal as well as external pressure. -The form of the transverse ribs 25 may, of course, be other than that suggested and might be triangular or bracket-shaped in cross section, or angle-iron or similar material might be used for this purpose. If necessary, both the strengthening ribs 24 and the strips 25 maylsalso be provided on the inside of the we In some cases the transverse edges necting the frames in an accessible and regulable manner to discharge passages.

2. A filter comprising a filter tank, filter frames adapted to be introduced thereinto by way of a side opening in the tank, a

closing member for said opening, means within the tank adjacent the member and independent of the member for connecting the frames to discharge passages in an accessible and regulable manner andtop and bottom uide plates of corrugated material.

3. A lter comprising a filter tank, filter frames adapted to be introduced thereinto by way of a side opening in the tank, a movable closure for said opening, corrugated guide and distributing plates, in said tank, and means within the tank adjacent said closure and independent of the closure for connecting the frames in an accessible and regulable manner to discharge passages.

4. A filter comprising a filter tank constructed from sheets of metal joined together at their adjacent bent up edges forming strengthening ribs, filter frames adapted to be introduced into said tank, a closable opening in the side of the tank. discharge passages in said tank, means in the tank at said opening for connecting the frames in an accessible and regulable manner to said discharge passages, and distributing and "of filter frames, means for connecting the frames to discharge passages and distributmg plates over the filter plates and spacing sald frames constituted by perforated corrugated lates.

6. A lter comprising a tank, a lateral door therefor. filter frames in the tank independent of the door, inserted and removed through the door, discharge means in the tank common to said frames arranged above and below the frames at said door, and means between the frames and door to effect ready connection of the frames and their discharge means.

. 7. A filter comprising a tank, a lateral door therefor and removable filter frames in the tank arranged perpendicular to said door, filter frames inserted and removed from the tank in a horizontal. direction through said door, discharge means arranged above and below the frames in the tank, removable bridges between the frames and door, and screws'oarried by said bridges to separately force the frames into liquidtight contact with id discharge means, and

means forspaein the frames in the tank and also distributmg liquid between them. it In testimony that we claim the foregoing as our invention we have signedour names this 3rd day of March, 1926.

THEOBALD FRIEDRICH SEITZ. enone HEICH snrrz, JR. 

